Basic code to receive emails from SendGrid and display the email content.

index.js

const express = require('express')
const multer = require('multer')

const app = express()
const upload = multer()

app.post('/api/parse', upload.any(), async (req, res) => {

    const body = req.body

    console.log("to: ", body.to); // Receiver Email List
    console.log("cc: ", body.cc); // CC Email List
    console.log("from: ", body.from); // Sender Email
    console.log("subject: ", body.subject); // Subject
    console.log("text: ", body.text); // Email body in text
    console.log("html: ", body.html); // Email body in HTML
    console.log("attachments: ", body.attachments); // Attachment List of Email
    console.log(req.files); // Attachment Files in Base64

    return res.status(200).send();
});

app.listen(3000, () => {
    console.log(`Webserver running on 3000`)
});